Canon Speedlite 600EX-RT - Manual (Page 46)

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Flash Control from Camera’s Menu Screen
Flash firing
To perform flash shooting, set to [Enable]. To use the flash’s AF-
assist beam only, set to [Disable].
E-TTL II flash metering
For normal exposures, set it to [Evaluative].
If [Average] is set, the flash exposure will be averaged for the entire
scene metered by the camera. Flash exposure compensation may
be necessary depending on the scene. This setting is for advanced
users.
Flash synchronization speed in Av mode
You can set the flash sync speed when shooting in aperture-priority
AE (Av) mode with flash.
Flash mode
You can select the flash mode from [E-TTL II], [Manual flash],
[MULTI flash], [AutoExtFlash] and [Man.ExtFlash] to suit your
desired flash shooting.
When the flash’s Custom Function C.Fn-05 is set to [1:TTL] (p.96),
[TTL] can be selected. When performing autoflash shooting with an
EOS digital camera, set to [0:E-TTL II/E-TTL].
Shutter synchronization
You can select the flash firing timing/method from [1st curtain], [2nd
curtain] and [High-speed synchronization]. To perform normal
flash shooting, set [1st curtain].
Flash exposure compensation
In the same way as normal exposure compensation, you can set
exposure compensation for flash. The flash exposure compensation
amount can be set up to ±3 stops in 1/3-stop increments.
FEB
You can take three shots while automatically changing the flash
output. The settable range is up to ±3 stops in 1/3-stop increments.
COP
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